Improvement in pocket-calendars



UNITED STATES PATENT OFFICE.

D. E. CROSBY, OF BROOKLYN, NFV YORK.

IMPROVEMENT IN POCKET-CALENDARS.

Specification forming part of Letters Patent No. 4 l ,605, dated February 16, 1864.

To all whom it may concern,.-

Be it known that I, D. E. CROSBY, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Perpetual Pocket-Calendar; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a face view of my invention. Fig. 2 is a vertical central section of the same.

Similar letters of reference indicate corresponding parts in both figures.

The object of this invention is to produce a perpetual calendar which can be conveniently carried in the pocket and which when once set is not liable to shift spontaneously.

The nature of my invention and its particular advantages will be readily understood from the following description.

A represents a disk, of sheet-brass or otherv suitable material, of one inch and ahalf (more or less) diameter, and marked with the figures from l to 3l, arranged in seven radial columns, and in such order as may berequired for the purpose to be attained.

In order to be able to place the figures in a lregular position, the face of the disk may be divided off into five annular spaces by means of six concentric circles, a, all described from of said columns each of the other letters will correspond in position to one of the other columns. By turning the dialB at the beginning of each month so that the proper day is opposite the figure l on the disk A the calendar is set, and it requires no shifting until the end of the month when it must be adjusted again for the following month.

If the calendar is carried in the pocket, it is obvious that the dial B would be liable to shift its position accidentally, and the correctness of the device would be impaired. It is therefore indispensable for a pocket-calendar that said dial shall be held by some suitable means sufliciently firm to prevent it from shifting spontaneously and still yielding so that it can be moved easily by hand. In o1'- der to effect this purpose, I- have arranged under the pivot b, which forms the fulcrum of the dial, a metallic spring, c, which causes sufcient friction to retain said dial in place,

and which also forms a sort of handle by which l,the operation of adjusting the dial is facilitated. The position of this springmight be changed. It could be arranged under the dial, or the dial itself might be so shaped that it forms a spring, and I do not want to confine myself to the precise position and arrangement shown in the drawings. By the use of the spring I am enabled to produce a calendar which can be carried in the pocket without danger of shifting spontaneously.

What I claim as new, and desire" to secure by Letters Patent, is-` 'Ihe employment or use of a spring. c, or its equivalent, in combination with the dial B and disk A, as and for the purposes speciiied.

D. E. CROSBY. Witnesses:

D. ROBERTSON, M; M. LIVINGSTON. 

